Bridge-gate



H. PpBARiNDT.

(No Model.)

BRIDGE GATE.

Patented Mar; 13

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n'rnrir IIALBERT F. BARNDT, OF CHICAGO, ILLINOIS.

BRIDGE-GATE.

SPECIFICATION forming part of Letters Patent No. 516,179, dated March13, 1894.

Application filed November 27, 1893. Serial No. 492,080. (No model.)

To all whom it may concern:

Be it known that I, HALBERT F. BARNDT, a citizen of the United States ofAmerica, residing at Chicago, in the county of Cook and State ofIllinois, haveinvented certain new and useful Improvements inBridge-Gates, of which the followingis a specification.

My invention relates to certain improvements in bridge gates, saidimprovements being in the nature of additions and alterations in thestyle of bridge gate for which I heretofore have obtained a patent, saidpatent being dated the 24th day of November, 1891, and numbered 463,677.

My improvements are illustrated by means of the drawings presentedherewith, of which, Figure 1, is a plan view of acomplete swing bridge.Fig. 2 is a partial elevation showing the middle of said bridge and oneend. Fig. 3 is an elevation of one of the abutments looking from thebridge. Fig. 4 isa detail of the operating levers; and Fig. 5 is abroken plan in detail of certain connecting rods hereinafter described.

In the drawings, the bridge is lettered A, the abutments B, and thegates C. The latter move vertically between rollers, c, and are balancedby weights, D, as shown in Fig. 3. The face of each gate is providedwith flanges, c', forming a curved groove between them commencing atabout the level of the roadway at each end of each gate and rising atthe middle thereof to near the top. The ends of the bridge are providedwith projecting rollers adapted to enter these grooves to crowd the gatedownward as the bridge closes and raise it again as the bridge opens.

Fig. 2 at b, and there are four of them, two at each end of the bridge,all journaled upon the respective ends cf four sliding rods, b',supported by suitable brackets beneath the bridge and extending tobell-crank levers, b2, under the center of the bridge. From 'theselevers vertical rods, b3, extend to Vthe box or house occupied by theoperator, and are there fastened to hand-levers, b4, by 'means of whichthe rods may be moved when desired. These rods are given enough throwlongitudinally to enable the rollers `atvtheir ends to be withdrawnentirely from the grooves between the anges, o', and thereby leave thegates entirely under the iniiuence of the balancing weights, D, which atonce close them. This enables the operator to close any of the gates atwill, and, as in the case of a bridge with two roadways, the gates atthe opposite ends of the respective roadways are always closed at thesame time, one governing lever, b4, is sufficient for these two gates.For instance, the gate upon the end of each roadway toward which thevehicles are coming is always closed first to prevent other vehiclesfrom entering the bridge, while those already upon it are getting off atthe other end. It is also often convenient to be able to lower any ofthe gates from a central position, and for this purpose I run wires, d,from each of the weights, D, over suitable pulleys to the top of a posterected over the center of the abutment, and from there to a turn-tableupon the top of the bridge, from which the wires extend down to handleswithin reach of the bridge tender, and by means of which he can raiseany one of the weights and allow the gate governed thereby to drop byits own gravity.

In operating a double-track bridge the rollers, b, upon the ends of thebridge which approach the abutments first in closing, are held backuntil they pass the mouths of the first grooves, or the grooves upon thefirst gates, to avoid opening, and afterward closing these two gates. Asit would be rather difcult to release these rollers when they comeexactly to the middle of the abutments, I provide pivoted dogs, o2,which will permit the passage of the rollers from beneath the lowerange, c', but not from above thesam'e, the latter be- IOO ing preventedby stops, c3, upon which said dogs usually rest by their own weight.

I claim as new and desire to secure by Letters Patentl. The combinationwith the bridge, A, abntments, B, vertically sliding gates, C, providedwith the grooves, c', and the balancing Weights, D, of the rollers, b,adapted to enter said grooves and mounted upon sliding rods running to acentral portion of the bridge, by means of which said rollers may beWithdrawn from operative position from said central portion;substantially as described.

2. The combination with the bridge, A, abutments, B, vertically slidinggates, C, provided with grooves, c', balancing Weights, D, and rollers,b, carried by sliding rods extending to the center of the bridge andprovided with means located there for operating them, of the pivoteddogs, c2, and stops, ad, whereby the passage of the rollers is permittedfrom beneath the anges, but not above the same; substantially asdescribed.

3. The combination with the bridge, A, abutments, B, vertically slidinggates, C, and balancing Weights, D, of the Wires, d, attached to theWeights, D, and extending over suitable pulleys to a central portion ofthe bridge, whereby said weights may be lifted by the operator locatedat said central position; substantially as described.

4. The combination with the bridge, A, abutments, B, vertically slidinggates, C, and balancing weights, D, of the rollers, b, carried bysliding rods extending tothe center of the bridge and provided withmeans located there for moving them, and the Wires, d, attached to theWeights, D, and running over suitable pulleys also extending to thecenter of the bridge and provided there with suitable handles;substantially as described.

I-IALBERT F. BARNDT.

Witnesses:

CHARLES O. SHERVEY, A. I. I-I. EBBEsEN.

